NAG1 Shifter - ESM

U0100-LOST COMMUNICATION WITH ECM/PCM - ESM

For a complete wiring diagram Refer to Diagrams/Electrical Electrical Diagrams


Theory of Operation


Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module (ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to communicate the MIL status to the Engine Controller.


For CAN BUS diagnostic procedures refer to Communications.